Spring-bed.



A. A. CHAPMAN.

SPRING BED.

APPLICATION FILED JUNE 5,1911y Patented Nov. 17, 1914.

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UNITED STATES PATENT OFFICE.

ARTHUR A. CHAPMAN, OF HARTWELL, OHIO, ASSIGNOR' T0 THE M. A. HUNT COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

SPRING-BED.

Application led June 5, 1911.

To all 'whom it-mayeoncem Be it known that I, ARTHUR A. CHAPMAN, a citizen of the United States of America, and a resident of Hartwell, in the county of Hamilton and State of Ohio, have invented a certain-new and useful Improvement in Spring-Beds, of which the followingis a specilication.

This invention relates to spring-beds or, more particularly s eaking, to spring-structures used for resi iently supporting pads and mattresses.

The prime object of the invention is to provide a grille or a net-work of longitudinal and transverse strips of Hat wire or fiat sheet-metal of suitable width so that at intersections f said longitudinal and transverse strips the flat metal is bent or twisted so as to lie horizontal and at a right-angle to t-he remaining parts of the flat strips that lie or intervene between said intersections and applying said grille so that. said intersections shall lie concentric to the volutes of the least diameter in the several spirals ot' the spring-structure and, also, so that the intervening portions of said flat metal strips shall-be disposedon vertical edge and thereby enhance the strength and binding or reinforcing stiffness of the structure, while at the same time reducing the exposed upper surface of said flat metal strips to a dust and dirt catching minimum.

Another object of the invention is to provide a grille reinforcing or binding structure whose horizontal, flat intersections are riveted or otherwise suitably fastened together and whose twisted portions lie adjacent to the peripheries of the volutes of least diameter in the spirals wherein said in` tersections are arranged or intermeshed and whereby said spirals are prevented from shifting either laterally or longitudinally, thus assuring the vertical alinement of the springs in use, which is a very important factor in the compression of said spirals in a perpendicular line when in said use.

The invention consists in certain novel features of arrangement and construction, based entirely on the details referred to in the above-named objects of the invention, all of which will be fully hereinafter described and particularly pointed out in the claim.

In the accompanyingr sheet of drawings, Figure l is a side elevation of a fragmentary Specification of Letters Patent.

Patented Nov. 17, 1914. seriai No. 631,420,

portion of a spring-structure embodying my invention herein; Fig. 2, a plan view of saine; Fig. 3, a perspective view of a fragmentary portion of the grille or net-work forming the essential feature of the invention herein, but detached from the springs; and Fig. 4, a perspective view showing one intersection of said grille, but on a larger scale than that of ll'ig. 3.

l indicates each one of a plurality of spirals used in bed-spring structures. In the present instance, however, I have shown spirals, not of the ordinary hour-glass form, but of extended length vertically, being of greatest diameter in the top coils thereof, thentapering down to the center or midheight and then somewhat increasing in diameter part way to their lower ends and then decreasing in diameter till they reach the least diameter of all at their ex,

treme lower ends, the latter terminating into a rivet-fastening 2 that is made in connection with a flat metal strip or Slat 3 that forms one of a number of such slats inclosed in a marginal-frame 4. An upper border or binding wire 5 is provided, as customary, and the upper end-coils of the several spirals are connected to said bindingwire 5 by means of suitable cross-stays 6, the latter being duly connected transversely b v tie-wires 7.

Thus far, in this description, the parts enumerated are not new but are mentloned and shown by way of illustrating the application of my invention herein which I will now proceed to describe.

grille or net-work of fiat wire or Hat metal strips is provided and inserted in the array of perpendicularly-supported spirals 1, the intersections of such grille or net-work lying concentrically or intermeshed within the volutes of least diameter at or about midheight of said spirals, as best seen in Fig. 1. This grille is composed of strips of flat wire or fiat sheet-metal of suitable width so that it can be twisted at right-angles at such intervals in its length as shall correspond to the intervals between the vertical axes of the array of spirals within the frame of the spring-structure. Such twists in the strips are at either side of the actual intersections of said strips, said actual intersections being secured together by means of rivets 8, as best seen in Fig. 4. It will be seen that the fiat strips lie horizontal at each of said inter- 1,1 rms@ sections and at the intermediate parts of said strips, between intersections, lie on vertical edge at right-angles to said horizontal portions in the intersettions.

9 indicates the horizontal intersecting portions of the iiat metal strips of the grille, and 10 indicates each of the intermediate portions that lie on vertical edge between said intersections.

It will be seen, in FigA, that the perimeter of the middle volute (shown in dotted-lines) of the spiral` l lies within the twisted portions ll of the flut metal strips and thus provision made whereby the spirals cannot shift mid-length in either horizontal direction and the perpendicularity of each spiral is absolutely assured and preserved, whereby proper resilient action of the springs is maintained in use.

The grille made and arranged as above described, and used in connection with the spirals, especially such spirals as are of eX- tended length, as are shown and described herein, serves to connect the spirals inidheight in a rm and positive manner, proof against leaning or canting, or breaking down sidewise in use. The spring-structure is greatly strengthened and reinforced by the use of such a grille and a uniform resiliency is given to the perpendicular compression of the spirals, said grille practically forming a skeleton-frame that is distributed equally throughout the structure and causes the spirals to move in unison at'all times. The

collection or gathering of dust and dirt is reduced to a minimum owing to the intermediate portions 10 of the Hat metal strips being disposed on vertical edge, the horizontal parts 9 at the intersections being the only points in the grille on which any dust can lodge to any extent whatever.

I claim A spring-bed structure comprising rows of equally distributed vertical spirals each of extended length and ofl somewhat contracted diameter about midheight, and a grille or supporting net-work of crossed sheet-metal strips, each of the latter-named strips having the narrow faces of its opposite edges or longitudinal sides lying in a horizontal plane and with its body portion made with pairs of adjacent opposite twists at regular crossing-intervals apart so that its broad iiat faces shall be disposed horizontally at the said crossing-intervals only and adapted to aline and be riveted together at said crossing-intervals only, which crossingintervals are each intermeshed with the volutes of the respective spirals at said contracted portions thereof and are adapted to confine or fasten said intermeshed volutes between the said twists in the strips at said crossing -intervals to prevent any lateral movement of the spirals in their vertical relation with each other and with the binding grille or supporting net-Work.

ARTHUR A. CHAPMAN. Witnesses:

JOHN ELIAS JONES, LEWIS W. IRWIN. 

